CVE-2026-0228

PAN-OS: Improper Validation of Terminal Server Agent Certificate

At a glance

Severity: LOW 1.3
EPSS: EPSS 0.21 % · percentile 10 (2026-10-27)
State: PUBLISHED
Published: 2026-02-11
Updated: 2026-02-11
Assigner: palo_alto
NVD status: Deferred

Description

An improper certificate validation vulnerability in PAN-OS allows users to connect Terminal Server Agents on Windows to PAN-OS using expired certificates even if the PAN-OS configuration would not normally permit them to do so.

Scores

Version	Score	Vector	Scored by
CVSS 4.0	LOW 1.3	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:L/SI:N/SA:N/E:U/AU:N/R:U/V:D/RE:M/U:Amber	palo_alto
CVSS 4.0	LOW 1.3	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:L/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:N/R:U/V:D/RE:M/U:Amber	NVD · psirt@paloaltonetworks.com (Secondary)

Weaknesses (CWE)

CWE-295

European references

ENISA EUVD · EUVD-2026-5939
GCVE · GCVE-0-2026-0228

CERT-FR advisories

CERTFR-2026-AVI-0160 — Multiples vulnérabilités dans les produits Palo Alto Networks · cert.ssi.gouv.fr

Affected products

Product	Versions
Palo Alto Networks · Cloud NGFW	unaffected All
Palo Alto Networks · PAN-OS	unaffected 12.1.0 < 11.2.8 ; affected 11.2.0 < 11.2.8 ; affected 11.1.0 < 11.1.11 ; affected 10.2.0 < 10.2.17
Palo Alto Networks · Prisma Access	affected 10.2.0 < 10.2.10-h28

References

https://security.paloaltonetworks.com/CVE-2026-0228

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD